Stretchable & Water proof Epithelium : -

Options

A. Simple cuboidal
B. Simple squamous
C. Simple colummer
D. Transitional

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the type of epithelium that is both stretchable and waterproof.

2. **Reviewing the Options**: The options provided are:
- Simple cuboidal
- Simple squamous
- Simple columnar
- Transitional

3. **Analyzing Each Option**:
- **Simple Cuboidal Epithelium**: This type consists of a single layer of cube-shaped cells and is not specifically known for being stretchable or waterproof.
- **Simple Squamous Epithelium**: This type consists of a single layer of flat cells and is primarily involved in diffusion and filtration, not stretchable or waterproof.
- **Simple Columnar Epithelium**: This type consists of a single layer of tall, column-like cells and is more involved in absorption and secretion, not stretchable or waterproof.
- **Transitional Epithelium**: This type consists of multiple layers of cells that can change shape (stretch) and is found in areas that need to expand, such as the urinary bladder. It is also waterproof due to the presence of keratinized cells.

4. **Identifying the Correct Answer**: Based on the analysis, the only epithelium that is stretchable and waterproof is **Transitional Epithelium**.

5. **Conclusion**: Therefore, the correct answer to the question is **Transitional Epithelium**.